identify the greatest common factor of 12a^4b^7 and 18a^5b^3

A.12a^4 b^3
B.12a^5 b^7
C.6a^5 b^7
D. 6a^4 b^3

The greatest common factor of 12a^4b^7 and 18a^5b^3 is 6a^4b^3.

To find the greatest common factor, you need to find the highest power of each variable that appears in both numbers. In this case, the highest power of 'a' that appears in both numbers is a^4, and the highest power of 'b' that appears in both numbers is b^3.

Therefore, the greatest common factor is 6a^4b^3.

So the correct answer is D. 6a^4b^3.